Ukungu wa Marehemu wa NyanyaIdentification & Treatment Guide 2026
Phytophthora infestans · Family: Peronosporaceae
Ukungu wa marehemu wa nyanya husababishwa na Phytophthora infestans. Huzalisha vidonda vya kijivu-kijani vyenye maji ambavyo haraka hugeuka kahawia meusi, na ukungu mweupe chini ya majani katika hali ya unyevu. Unaweza kuharibu mazao ndani ya siku. Piga dawa za kuzuia za shaba au mancozeb, haribu mimea iliyoambukizwa mara moja, na tumia aina zinazostahimili.
Scan This Plant NowQuick Diagnosis
criticalUkungu wa Marehemu wa Nyanya
- Affects
- leavesstemsfruittubers
- Peak Season
- Cool wet weather (10-25°C with high humidity), late season in temperate zones, rainy season in tropics
- Spread Risk
- Fast
- Spread By
- Airborne sporangia carried by wind and rain, infected seed tubers, volunteer plants
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Symptoms: What does Ukungu wa Marehemu wa Nyanya look like?
Visual identification guide — tap each stage for details
Water-soaked pale green patches
Viraka visivyo na umbo, vyenye maji, vya kijani kibichi hadi kijivu-kijani huonekana kwenye ncha na kingo za majani. Vidonda huonekana kama vimejaa mafuta au unyevu.
Expanding dark lesions with white mold
Viraka hupanuka haraka na kugeuka kahawia meusi hadi zambarau-meusi. Sporulesheni nyeupe ya pamba huonekana chini ya majani asubuhi za unyevu. Mashina huendeleza vidonda vya kahawia meusi.
Plant collapse and fruit rot
Mmea mzima hunyauka na kuanguka ndani ya siku. Matunda huendeleza vidonda imara, vyenye kuonekana kama vimejaa mafuta, vya kahawia visivyo na umbo. Harufu mbaya inapoingia bakteria za sekondari kwenye tishu zilizokufa.
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